- Add drone test environment
- Add drone config
- apt phpunit
- Fix api.php
- Fix item.php
- Fix DBStructure
- Check if caching is possible during tests

- Fix issue where matching literal square brackets were removed with their content
- Fix issue where content without line feeds between BBCode tags would end up compacted in plain text
- Update extr calls to BBCode::toPlaintext in api

- Rename api_get_status() to api_get_item()
- Ad new api_format_item() function for single item formatting

- Remove 'raw' type from api_status_show()
- Add new api_get_status() and api_get_last_status() functions
- Use api_get_last_status() in api_account_verify_credentials() and api_show_user()

- converted single-line if() block to multi-line and with curly braces
- "imported" SPL classes to have unified code style
- always initialize your variables ... :-/
- added some empty lines/spaces for better readability

Signed-off-by: Roland Häder <roland@mxchange.org>

- Fix unused condition in api_status_show()
- Fix wrong operator orders in api_get_entitites()
- Fix wrong variable usage in api_account_update_profile_image()

- Remove unused variables

- Remove unused use statements
- Add required use statements